1/*
   2 * Copyright (c) 2010-2011 Atheros Communications Inc.
   3 *
   4 * Permission to use, copy, modify, and/or distribute this software for any
   5 * purpose with or without fee is hereby granted, provided that the above
   6 * copyright notice and this permission notice appear in all copies.
   7 *
   8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  15 */
  16
  17#include <linux/export.h>
  18#include "hw.h"
  19#include "ar9003_phy.h"
  20
  21void ar9003_paprd_enable(struct ath_hw *ah, bool val)
  22{
  23	struct ath9k_channel *chan = ah->curchan;
  24	bool is2ghz = IS_CHAN_2GHZ(chan);
  25
  26	/*
  27	 * 3 bits for modalHeader5G.papdRateMaskHt20
  28	 * is used for sub-band disabling of PAPRD.
  29	 * 5G band is divided into 3 sub-bands -- upper,
  30	 * middle, lower.
  31	 * if bit 30 of modalHeader5G.papdRateMaskHt20 is set
  32	 * -- disable PAPRD for upper band 5GHz
  33	 * if bit 29 of modalHeader5G.papdRateMaskHt20 is set
  34	 * -- disable PAPRD for middle band 5GHz
  35	 * if bit 28 of modalHeader5G.papdRateMaskHt20 is set
  36	 * -- disable PAPRD for lower band 5GHz
  37	 */
  38
  39	if (!is2ghz) {
  40		if (chan->channel >= UPPER_5G_SUB_BAND_START) {
  41			if (ar9003_get_paprd_rate_mask_ht20(ah, is2ghz)
  42								  & BIT(30))
  43				val = false;
  44		} else if (chan->channel >= MID_5G_SUB_BAND_START) {
  45			if (ar9003_get_paprd_rate_mask_ht20(ah, is2ghz)
  46								  & BIT(29))
  47				val = false;
  48		} else {
  49			if (ar9003_get_paprd_rate_mask_ht20(ah, is2ghz)
  50								  & BIT(28))
  51				val = false;
  52		}
  53	}
  54
  55	if (val) {
  56		ah->paprd_table_write_done = true;
  57		ath9k_hw_apply_txpower(ah, chan, false);
  58	}
  59
  60	REG_RMW_FIELD(ah, AR_PHY_PAPRD_CTRL0_B0,
  61		      AR_PHY_PAPRD_CTRL0_PAPRD_ENABLE, !!val);
  62	if (ah->caps.tx_chainmask & BIT(1))
  63		REG_RMW_FIELD(ah, AR_PHY_PAPRD_CTRL0_B1,
  64			      AR_PHY_PAPRD_CTRL0_PAPRD_ENABLE, !!val);
  65	if (ah->caps.tx_chainmask & BIT(2))
  66		REG_RMW_FIELD(ah, AR_PHY_PAPRD_CTRL0_B2,
  67			      AR_PHY_PAPRD_CTRL0_PAPRD_ENABLE, !!val);
  68}
  69EXPORT_SYMBOL(ar9003_paprd_enable);
  70
  71static int ar9003_get_training_power_2g(struct ath_hw *ah)
  72{
  73	struct ath9k_channel *chan = ah->curchan;
  74	unsigned int power, scale, delta;
  75
  76	scale = ar9003_get_paprd_scale_factor(ah, chan);
  77
  78	if (AR_SREV_9330(ah) || AR_SREV_9340(ah) ||
  79	    AR_SREV_9462(ah) || AR_SREV_9565(ah)) {
  80		power = ah->paprd_target_power + 2;
  81	} else if (AR_SREV_9485(ah)) {
  82		power = 25;
  83	} else {
  84		power = REG_READ_FIELD(ah, AR_PHY_POWERTX_RATE5,
  85				       AR_PHY_POWERTX_RATE5_POWERTXHT20_0);
  86
  87		delta = abs((int) ah->paprd_target_power - (int) power);
  88		if (delta > scale)
  89			return -1;
  90
  91		if (delta < 4)
  92			power -= 4 - delta;
  93	}
  94
  95	return power;
  96}
  97
  98static int ar9003_get_training_power_5g(struct ath_hw *ah)
  99{
 100	struct ath_common *common = ath9k_hw_common(ah);
 101	struct ath9k_channel *chan = ah->curchan;
 102	unsigned int power, scale, delta;
 103
 104	scale = ar9003_get_paprd_scale_factor(ah, chan);
 105
 106	if (IS_CHAN_HT40(chan))
 107		power = REG_READ_FIELD(ah, AR_PHY_POWERTX_RATE8,
 108			AR_PHY_POWERTX_RATE8_POWERTXHT40_5);
 109	else
 110		power = REG_READ_FIELD(ah, AR_PHY_POWERTX_RATE6,
 111			AR_PHY_POWERTX_RATE6_POWERTXHT20_5);
 112
 113	power += scale;
 114	delta = abs((int) ah->paprd_target_power - (int) power);
 115	if (delta > scale)
 116		return -1;
 117
 118	switch (get_streams(ah->txchainmask)) {
 119	case 1:
 120		delta = 6;
 121		break;
 122	case 2:
 123		delta = 4;
 124		break;
 125	case 3:
 126		delta = 2;
 127		break;
 128	default:
 129		delta = 0;
 130		ath_dbg(common, CALIBRATE, "Invalid tx-chainmask: %u\n",
 131			ah->txchainmask);
 132	}
 133
 134	power += delta;
 135	return power;
 136}
 137
 138static int ar9003_paprd_setup_single_table(struct ath_hw *ah)
 139{
 140	struct ath_common *common = ath9k_hw_common(ah);
 141	static const u32 ctrl0[3] = {
 142		AR_PHY_PAPRD_CTRL0_B0,
 143		AR_PHY_PAPRD_CTRL0_B1,
 144		AR_PHY_PAPRD_CTRL0_B2
 145	};
 146	static const u32 ctrl1[3] = {
 147		AR_PHY_PAPRD_CTRL1_B0,
 148		AR_PHY_PAPRD_CTRL1_B1,
 149		AR_PHY_PAPRD_CTRL1_B2
 150	};
 151	int training_power;
 152	int i, val;
 153	u32 am2pm_mask = ah->paprd_ratemask;
 154
 155	if (IS_CHAN_2GHZ(ah->curchan))
 156		training_power = ar9003_get_training_power_2g(ah);
 157	else
 158		training_power = ar9003_get_training_power_5g(ah);
 159
 160	ath_dbg(common, CALIBRATE, "Training power: %d, Target power: %d\n",
 161		training_power, ah->paprd_target_power);
 162
 163	if (training_power < 0) {
 164		ath_dbg(common, CALIBRATE,
 165			"PAPRD target power delta out of range\n");
 166		return -ERANGE;
 167	}
 168	ah->paprd_training_power = training_power;
 169
 170	if (AR_SREV_9330(ah))
 171		am2pm_mask = 0;
 172
 173	REG_RMW_FIELD(ah, AR_PHY_PAPRD_AM2AM, AR_PHY_PAPRD_AM2AM_MASK,
 174		      ah->paprd_ratemask);
 175	REG_RMW_FIELD(ah, AR_PHY_PAPRD_AM2PM, AR_PHY_PAPRD_AM2PM_MASK,
 176		      am2pm_mask);
 177	REG_RMW_FIELD(ah, AR_PHY_PAPRD_HT40, AR_PHY_PAPRD_HT40_MASK,
 178		      ah->paprd_ratemask_ht40);
 179
 180	ath_dbg(common, CALIBRATE, "PAPRD HT20 mask: 0x%x, HT40 mask: 0x%x\n",
 181		ah->paprd_ratemask, ah->paprd_ratemask_ht40);
 182
 183	for (i = 0; i < ah->caps.max_txchains; i++) {
 184		REG_RMW_FIELD(ah, ctrl0[i],
 185			      AR_PHY_PAPRD_CTRL0_USE_SINGLE_TABLE_MASK, 1);
 186		REG_RMW_FIELD(ah, ctrl1[i],
 187			      AR_PHY_PAPRD_CTRL1_ADAPTIVE_AM2PM_ENABLE, 1);
 188		REG_RMW_FIELD(ah, ctrl1[i],
 189			      AR_PHY_PAPRD_CTRL1_ADAPTIVE_AM2AM_ENABLE, 1);
 190		REG_RMW_FIELD(ah, ctrl1[i],
 191			      AR_PHY_PAPRD_CTRL1_ADAPTIVE_SCALING_ENA, 0);
 192		REG_RMW_FIELD(ah, ctrl1[i],
 193			      AR_PHY_PAPRD_CTRL1_PA_GAIN_SCALE_FACT_MASK, 181);
 194		REG_RMW_FIELD(ah, ctrl1[i],
 195			      AR_PHY_PAPRD_CTRL1_PAPRD_MAG_SCALE_FACT, 361);
 196		REG_RMW_FIELD(ah, ctrl1[i],
 197			      AR_PHY_PAPRD_CTRL1_ADAPTIVE_SCALING_ENA, 0);
 198		REG_RMW_FIELD(ah, ctrl0[i],
 199			      AR_PHY_PAPRD_CTRL0_PAPRD_MAG_THRSH, 3);
 200	}
 201
 202	ar9003_paprd_enable(ah, false);
 203
 204	REG_RMW_FIELD(ah, AR_PHY_PAPRD_TRAINER_CNTL1(ah),
 205		      AR_PHY_PAPRD_TRAINER_CNTL1_CF_PAPRD_LB_SKIP, 0x30);
 206	REG_RMW_FIELD(ah, AR_PHY_PAPRD_TRAINER_CNTL1(ah),
 207		      AR_PHY_PAPRD_TRAINER_CNTL1_CF_PAPRD_LB_ENABLE, 1);
 208	REG_RMW_FIELD(ah, AR_PHY_PAPRD_TRAINER_CNTL1(ah),
 209		      AR_PHY_PAPRD_TRAINER_CNTL1_CF_PAPRD_TX_GAIN_FORCE, 1);
 210	REG_RMW_FIELD(ah, AR_PHY_PAPRD_TRAINER_CNTL1(ah),
 211		      AR_PHY_PAPRD_TRAINER_CNTL1_CF_PAPRD_RX_BB_GAIN_FORCE, 0);
 212	REG_RMW_FIELD(ah, AR_PHY_PAPRD_TRAINER_CNTL1(ah),
 213		      AR_PHY_PAPRD_TRAINER_CNTL1_CF_PAPRD_IQCORR_ENABLE, 0);
 214	REG_RMW_FIELD(ah, AR_PHY_PAPRD_TRAINER_CNTL1(ah),
 215		      AR_PHY_PAPRD_TRAINER_CNTL1_CF_PAPRD_AGC2_SETTLING, 28);
 216	REG_RMW_FIELD(ah, AR_PHY_PAPRD_TRAINER_CNTL1(ah),
 217		      AR_PHY_PAPRD_TRAINER_CNTL1_CF_CF_PAPRD_TRAIN_ENABLE, 1);
 218
 219	if (AR_SREV_9485(ah)) {
 220		val = 148;
 221	} else {
 222		if (IS_CHAN_2GHZ(ah->curchan)) {
 223			if (AR_SREV_9462(ah) || AR_SREV_9565(ah))
 224				val = 145;
 225			else
 226				val = 147;
 227		} else {
 228			val = 137;
 229		}
 230	}
 231
 232	REG_RMW_FIELD(ah, AR_PHY_PAPRD_TRAINER_CNTL2(ah),
 233		      AR_PHY_PAPRD_TRAINER_CNTL2_CF_PAPRD_INIT_RX_BB_GAIN, val);
 234	REG_RMW_FIELD(ah, AR_PHY_PAPRD_TRAINER_CNTL3(ah),
 235		      AR_PHY_PAPRD_TRAINER_CNTL3_CF_PAPRD_FINE_CORR_LEN, 4);
 236	REG_RMW_FIELD(ah, AR_PHY_PAPRD_TRAINER_CNTL3(ah),
 237		      AR_PHY_PAPRD_TRAINER_CNTL3_CF_PAPRD_COARSE_CORR_LEN, 4);
 238	REG_RMW_FIELD(ah, AR_PHY_PAPRD_TRAINER_CNTL3(ah),
 239		      AR_PHY_PAPRD_TRAINER_CNTL3_CF_PAPRD_NUM_CORR_STAGES, 7);
 240	REG_RMW_FIELD(ah, AR_PHY_PAPRD_TRAINER_CNTL3(ah),
 241		      AR_PHY_PAPRD_TRAINER_CNTL3_CF_PAPRD_MIN_LOOPBACK_DEL, 1);
 242
 243	if (AR_SREV_9485(ah) ||
 244	    AR_SREV_9462(ah) ||
 245	    AR_SREV_9565(ah) ||
 246	    AR_SREV_9550(ah) ||
 247	    AR_SREV_9330(ah) ||
 248	    AR_SREV_9340(ah))
 249		REG_RMW_FIELD(ah, AR_PHY_PAPRD_TRAINER_CNTL3(ah),
 250			      AR_PHY_PAPRD_TRAINER_CNTL3_CF_PAPRD_QUICK_DROP, -3);
 251	else
 252		REG_RMW_FIELD(ah, AR_PHY_PAPRD_TRAINER_CNTL3(ah),
 253			      AR_PHY_PAPRD_TRAINER_CNTL3_CF_PAPRD_QUICK_DROP, -6);
 254
 255	val = -10;
 256
 257	if (IS_CHAN_2GHZ(ah->curchan) && !AR_SREV_9462(ah) && !AR_SREV_9565(ah))
 258		val = -15;
 259
 260	REG_RMW_FIELD(ah, AR_PHY_PAPRD_TRAINER_CNTL3(ah),
 261		      AR_PHY_PAPRD_TRAINER_CNTL3_CF_PAPRD_ADC_DESIRED_SIZE,
 262		      val);
 263	REG_RMW_FIELD(ah, AR_PHY_PAPRD_TRAINER_CNTL3(ah),
 264		      AR_PHY_PAPRD_TRAINER_CNTL3_CF_PAPRD_BBTXMIX_DISABLE, 1);
 265	REG_RMW_FIELD(ah, AR_PHY_PAPRD_TRAINER_CNTL4(ah),
 266		      AR_PHY_PAPRD_TRAINER_CNTL4_CF_PAPRD_SAFETY_DELTA, 0);
 267	REG_RMW_FIELD(ah, AR_PHY_PAPRD_TRAINER_CNTL4(ah),
 268		      AR_PHY_PAPRD_TRAINER_CNTL4_CF_PAPRD_MIN_CORR, 400);
 269	REG_RMW_FIELD(ah, AR_PHY_PAPRD_TRAINER_CNTL4(ah),
 270		      AR_PHY_PAPRD_TRAINER_CNTL4_CF_PAPRD_NUM_TRAIN_SAMPLES,
 271		      100);
 272	REG_RMW_FIELD(ah, AR_PHY_PAPRD_PRE_POST_SCALE_0_B0,
 273		      AR_PHY_PAPRD_PRE_POST_SCALING, 261376);
 274	REG_RMW_FIELD(ah, AR_PHY_PAPRD_PRE_POST_SCALE_1_B0,
 275		      AR_PHY_PAPRD_PRE_POST_SCALING, 248079);
 276	REG_RMW_FIELD(ah, AR_PHY_PAPRD_PRE_POST_SCALE_2_B0,
 277		      AR_PHY_PAPRD_PRE_POST_SCALING, 233759);
 278	REG_RMW_FIELD(ah, AR_PHY_PAPRD_PRE_POST_SCALE_3_B0,
 279		      AR_PHY_PAPRD_PRE_POST_SCALING, 220464);
 280	REG_RMW_FIELD(ah, AR_PHY_PAPRD_PRE_POST_SCALE_4_B0,
 281		      AR_PHY_PAPRD_PRE_POST_SCALING, 208194);
 282	REG_RMW_FIELD(ah, AR_PHY_PAPRD_PRE_POST_SCALE_5_B0,
 283		      AR_PHY_PAPRD_PRE_POST_SCALING, 196949);
 284	REG_RMW_FIELD(ah, AR_PHY_PAPRD_PRE_POST_SCALE_6_B0,
 285		      AR_PHY_PAPRD_PRE_POST_SCALING, 185706);
 286	REG_RMW_FIELD(ah, AR_PHY_PAPRD_PRE_POST_SCALE_7_B0,
 287		      AR_PHY_PAPRD_PRE_POST_SCALING, 175487);
 288	return 0;
 289}
 290
 291static void ar9003_paprd_get_gain_table(struct ath_hw *ah)
 292{
 293	u32 *entry = ah->paprd_gain_table_entries;
 294	u8 *index = ah->paprd_gain_table_index;
 295	u32 reg = AR_PHY_TXGAIN_TABLE;
 296	int i;
 297
 298	for (i = 0; i < PAPRD_GAIN_TABLE_ENTRIES; i++) {
 299		entry[i] = REG_READ(ah, reg);
 300		index[i] = (entry[i] >> 24) & 0xff;
 301		reg += 4;
 302	}
 303}
 304
 305static unsigned int ar9003_get_desired_gain(struct ath_hw *ah, int chain,
 306					    int target_power)
 307{
 308	int olpc_gain_delta = 0, cl_gain_mod;
 309	int alpha_therm, alpha_volt;
 310	int therm_cal_value, volt_cal_value;
 311	int therm_value, volt_value;
 312	int thermal_gain_corr, voltage_gain_corr;
 313	int desired_scale, desired_gain = 0;
 314	u32 reg_olpc  = 0, reg_cl_gain  = 0;
 315
 316	REG_CLR_BIT(ah, AR_PHY_PAPRD_TRAINER_STAT1(ah),
 317		    AR_PHY_PAPRD_TRAINER_STAT1_PAPRD_TRAIN_DONE);
 318	desired_scale = REG_READ_FIELD(ah, AR_PHY_TPC_12,
 319				       AR_PHY_TPC_12_DESIRED_SCALE_HT40_5);
 320	alpha_therm = REG_READ_FIELD(ah, AR_PHY_TPC_19,
 321				     AR_PHY_TPC_19_ALPHA_THERM);
 322	alpha_volt = REG_READ_FIELD(ah, AR_PHY_TPC_19,
 323				    AR_PHY_TPC_19_ALPHA_VOLT);
 324	therm_cal_value = REG_READ_FIELD(ah, AR_PHY_TPC_18,
 325					 AR_PHY_TPC_18_THERM_CAL_VALUE);
 326	volt_cal_value = REG_READ_FIELD(ah, AR_PHY_TPC_18,
 327					AR_PHY_TPC_18_VOLT_CAL_VALUE);
 328	therm_value = REG_READ_FIELD(ah, AR_PHY_BB_THERM_ADC_4,
 329				     AR_PHY_BB_THERM_ADC_4_LATEST_THERM_VALUE);
 330	volt_value = REG_READ_FIELD(ah, AR_PHY_BB_THERM_ADC_4,
 331				    AR_PHY_BB_THERM_ADC_4_LATEST_VOLT_VALUE);
 332
 333	switch (chain) {
 334	case 0:
 335		reg_olpc = AR_PHY_TPC_11_B0;
 336		reg_cl_gain = AR_PHY_CL_TAB_0;
 337		break;
 338	case 1:
 339		reg_olpc = AR_PHY_TPC_11_B1;
 340		reg_cl_gain = AR_PHY_CL_TAB_1;
 341		break;
 342	case 2:
 343		reg_olpc = AR_PHY_TPC_11_B2;
 344		reg_cl_gain = AR_PHY_CL_TAB_2;
 345		break;
 346	default:
 347		ath_dbg(ath9k_hw_common(ah), CALIBRATE,
 348			"Invalid chainmask: %d\n", chain);
 349		break;
 350	}
 351
 352	olpc_gain_delta = REG_READ_FIELD(ah, reg_olpc,
 353					 AR_PHY_TPC_11_OLPC_GAIN_DELTA);
 354	cl_gain_mod = REG_READ_FIELD(ah, reg_cl_gain,
 355					 AR_PHY_CL_TAB_CL_GAIN_MOD);
 356
 357	if (olpc_gain_delta >= 128)
 358		olpc_gain_delta = olpc_gain_delta - 256;
 359
 360	thermal_gain_corr = (alpha_therm * (therm_value - therm_cal_value) +
 361			     (256 / 2)) / 256;
 362	voltage_gain_corr = (alpha_volt * (volt_value - volt_cal_value) +
 363			     (128 / 2)) / 128;
 364	desired_gain = target_power - olpc_gain_delta - thermal_gain_corr -
 365	    voltage_gain_corr + desired_scale + cl_gain_mod;
 366
 367	return desired_gain;
 368}
 369
 370static void ar9003_tx_force_gain(struct ath_hw *ah, unsigned int gain_index)
 371{
 372	int selected_gain_entry, txbb1dbgain, txbb6dbgain, txmxrgain;
 373	int padrvgnA, padrvgnB, padrvgnC, padrvgnD;
 374	u32 *gain_table_entries = ah->paprd_gain_table_entries;
 375
 376	selected_gain_entry = gain_table_entries[gain_index];
 377	txbb1dbgain = selected_gain_entry & 0x7;
 378	txbb6dbgain = (selected_gain_entry >> 3) & 0x3;
 379	txmxrgain = (selected_gain_entry >> 5) & 0xf;
 380	padrvgnA = (selected_gain_entry >> 9) & 0xf;
 381	padrvgnB = (selected_gain_entry >> 13) & 0xf;
 382	padrvgnC = (selected_gain_entry >> 17) & 0xf;
 383	padrvgnD = (selected_gain_entry >> 21) & 0x3;
 384
 385	REG_RMW_FIELD(ah, AR_PHY_TX_FORCED_GAIN,
 386		      AR_PHY_TX_FORCED_GAIN_FORCED_TXBB1DBGAIN, txbb1dbgain);
 387	REG_RMW_FIELD(ah, AR_PHY_TX_FORCED_GAIN,
 388		      AR_PHY_TX_FORCED_GAIN_FORCED_TXBB6DBGAIN, txbb6dbgain);
 389	REG_RMW_FIELD(ah, AR_PHY_TX_FORCED_GAIN,
 390		      AR_PHY_TX_FORCED_GAIN_FORCED_TXMXRGAIN, txmxrgain);
 391	REG_RMW_FIELD(ah, AR_PHY_TX_FORCED_GAIN,
 392		      AR_PHY_TX_FORCED_GAIN_FORCED_PADRVGNA, padrvgnA);
 393	REG_RMW_FIELD(ah, AR_PHY_TX_FORCED_GAIN,
 394		      AR_PHY_TX_FORCED_GAIN_FORCED_PADRVGNB, padrvgnB);
 395	REG_RMW_FIELD(ah, AR_PHY_TX_FORCED_GAIN,
 396		      AR_PHY_TX_FORCED_GAIN_FORCED_PADRVGNC, padrvgnC);
 397	REG_RMW_FIELD(ah, AR_PHY_TX_FORCED_GAIN,
 398		      AR_PHY_TX_FORCED_GAIN_FORCED_PADRVGND, padrvgnD);
 399	REG_RMW_FIELD(ah, AR_PHY_TX_FORCED_GAIN,
 400		      AR_PHY_TX_FORCED_GAIN_FORCED_ENABLE_PAL, 0);
 401	REG_RMW_FIELD(ah, AR_PHY_TX_FORCED_GAIN,
 402		      AR_PHY_TX_FORCED_GAIN_FORCE_TX_GAIN, 0);
 403	REG_RMW_FIELD(ah, AR_PHY_TPC_1, AR_PHY_TPC_1_FORCED_DAC_GAIN, 0);
 404	REG_RMW_FIELD(ah, AR_PHY_TPC_1, AR_PHY_TPC_1_FORCE_DAC_GAIN, 0);
 405}
 406
 407static inline int find_expn(int num)
 408{
 409	return fls(num) - 1;
 410}
 411
 412static inline int find_proper_scale(int expn, int N)
 413{
 414	return (expn > N) ? expn - 10 : 0;
 415}
 416
 417#define NUM_BIN 23
 418
 419static bool create_pa_curve(u32 *data_L, u32 *data_U, u32 *pa_table, u16 *gain)
 420{
 421	unsigned int thresh_accum_cnt;
 422	int x_est[NUM_BIN + 1], Y[NUM_BIN + 1], theta[NUM_BIN + 1];
 423	int PA_in[NUM_BIN + 1];
 424	int B1_tmp[NUM_BIN + 1], B2_tmp[NUM_BIN + 1];
 425	unsigned int B1_abs_max, B2_abs_max;
 426	int max_index, scale_factor;
 427	int y_est[NUM_BIN + 1];
 428	int x_est_fxp1_nonlin, x_tilde[NUM_BIN + 1];
 429	unsigned int x_tilde_abs;
 430	int G_fxp, Y_intercept, order_x_by_y, M, I, L, sum_y_sqr, sum_y_quad;
 431	int Q_x, Q_B1, Q_B2, beta_raw, alpha_raw, scale_B;
 432	int Q_scale_B, Q_beta, Q_alpha, alpha, beta, order_1, order_2;
 433	int order1_5x, order2_3x, order1_5x_rem, order2_3x_rem;
 434	int y5, y3, tmp;
 435	int theta_low_bin = 0;
 436	int i;
 437
 438	/* disregard any bin that contains <= 16 samples */
 439	thresh_accum_cnt = 16;
 440	scale_factor = 5;
 441	max_index = 0;
 442	memset(theta, 0, sizeof(theta));
 443	memset(x_est, 0, sizeof(x_est));
 444	memset(Y, 0, sizeof(Y));
 445	memset(y_est, 0, sizeof(y_est));
 446	memset(x_tilde, 0, sizeof(x_tilde));
 447
 448	for (i = 0; i < NUM_BIN; i++) {
 449		s32 accum_cnt, accum_tx, accum_rx, accum_ang;
 450
 451		/* number of samples */
 452		accum_cnt = data_L[i] & 0xffff;
 453
 454		if (accum_cnt <= thresh_accum_cnt)
 455			continue;
 456
 457		max_index++;
 458
 459		/* sum(tx amplitude) */
 460		accum_tx = ((data_L[i] >> 16) & 0xffff) |
 461		    ((data_U[i] & 0x7ff) << 16);
 462
 463		/* sum(rx amplitude distance to lower bin edge) */
 464		accum_rx = ((data_U[i] >> 11) & 0x1f) |
 465		    ((data_L[i + 23] & 0xffff) << 5);
 466
 467		/* sum(angles) */
 468		accum_ang = ((data_L[i + 23] >> 16) & 0xffff) |
 469		    ((data_U[i + 23] & 0x7ff) << 16);
 470
 471		accum_tx <<= scale_factor;
 472		accum_rx <<= scale_factor;
 473		x_est[max_index] =
 474			(((accum_tx + accum_cnt) / accum_cnt) + 32) >>
 475			scale_factor;
 476
 477		Y[max_index] =
 478			((((accum_rx + accum_cnt) / accum_cnt) + 32) >>
 479			    scale_factor) +
 480			(1 << scale_factor) * i + 16;
 481
 482		if (accum_ang >= (1 << 26))
 483			accum_ang -= 1 << 27;
 484
 485		theta[max_index] =
 486			((accum_ang * (1 << scale_factor)) + accum_cnt) /
 487			accum_cnt;
 488	}
 489
 490	/*
 491	 * Find average theta of first 5 bin and all of those to same value.
 492	 * Curve is linear at that range.
 493	 */
 494	for (i = 1; i < 6; i++)
 495		theta_low_bin += theta[i];
 496
 497	theta_low_bin = theta_low_bin / 5;
 498	for (i = 1; i < 6; i++)
 499		theta[i] = theta_low_bin;
 500
 501	/* Set values at origin */
 502	theta[0] = theta_low_bin;
 503	for (i = 0; i <= max_index; i++)
 504		theta[i] -= theta_low_bin;
 505
 506	x_est[0] = 0;
 507	Y[0] = 0;
 508	scale_factor = 8;
 509
 510	/* low signal gain */
 511	if (x_est[6] == x_est[3])
 512		return false;
 513
 514	G_fxp =
 515	    (((Y[6] - Y[3]) * 1 << scale_factor) +
 516	     (x_est[6] - x_est[3])) / (x_est[6] - x_est[3]);
 517
 518	/* prevent division by zero */
 519	if (G_fxp == 0)
 520		return false;
 521
 522	Y_intercept =
 523	    (G_fxp * (x_est[0] - x_est[3]) +
 524	     (1 << scale_factor)) / (1 << scale_factor) + Y[3];
 525
 526	for (i = 0; i <= max_index; i++)
 527		y_est[i] = Y[i] - Y_intercept;
 528
 529	for (i = 0; i <= 3; i++) {
 530		y_est[i] = i * 32;
 531		x_est[i] = ((y_est[i] * 1 << scale_factor) + G_fxp) / G_fxp;
 532	}
 533
 534	if (y_est[max_index] == 0)
 535		return false;
 536
 537	x_est_fxp1_nonlin =
 538	    x_est[max_index] - ((1 << scale_factor) * y_est[max_index] +
 539				G_fxp) / G_fxp;
 540
 541	order_x_by_y =
 542	    (x_est_fxp1_nonlin + y_est[max_index]) / y_est[max_index];
 543
 544	if (order_x_by_y == 0)
 545		M = 10;
 546	else if (order_x_by_y == 1)
 547		M = 9;
 548	else
 549		M = 8;
 550
 551	I = (max_index > 15) ? 7 : max_index >> 1;
 552	L = max_index - I;
 553	scale_factor = 8;
 554	sum_y_sqr = 0;
 555	sum_y_quad = 0;
 556	x_tilde_abs = 0;
 557
 558	for (i = 0; i <= L; i++) {
 559		unsigned int y_sqr;
 560		unsigned int y_quad;
 561		unsigned int tmp_abs;
 562
 563		/* prevent division by zero */
 564		if (y_est[i + I] == 0)
 565			return false;
 566
 567		x_est_fxp1_nonlin =
 568		    x_est[i + I] - ((1 << scale_factor) * y_est[i + I] +
 569				    G_fxp) / G_fxp;
 570
 571		x_tilde[i] =
 572		    (x_est_fxp1_nonlin * (1 << M) + y_est[i + I]) / y_est[i +
 573									  I];
 574		x_tilde[i] =
 575		    (x_tilde[i] * (1 << M) + y_est[i + I]) / y_est[i + I];
 576		x_tilde[i] =
 577		    (x_tilde[i] * (1 << M) + y_est[i + I]) / y_est[i + I];
 578		y_sqr =
 579		    (y_est[i + I] * y_est[i + I] +
 580		     (scale_factor * scale_factor)) / (scale_factor *
 581						       scale_factor);
 582		tmp_abs = abs(x_tilde[i]);
 583		if (tmp_abs > x_tilde_abs)
 584			x_tilde_abs = tmp_abs;
 585
 586		y_quad = y_sqr * y_sqr;
 587		sum_y_sqr = sum_y_sqr + y_sqr;
 588		sum_y_quad = sum_y_quad + y_quad;
 589		B1_tmp[i] = y_sqr * (L + 1);
 590		B2_tmp[i] = y_sqr;
 591	}
 592
 593	B1_abs_max = 0;
 594	B2_abs_max = 0;
 595	for (i = 0; i <= L; i++) {
 596		int abs_val;
 597
 598		B1_tmp[i] -= sum_y_sqr;
 599		B2_tmp[i] = sum_y_quad - sum_y_sqr * B2_tmp[i];
 600
 601		abs_val = abs(B1_tmp[i]);
 602		if (abs_val > B1_abs_max)
 603			B1_abs_max = abs_val;
 604
 605		abs_val = abs(B2_tmp[i]);
 606		if (abs_val > B2_abs_max)
 607			B2_abs_max = abs_val;
 608	}
 609
 610	Q_x = find_proper_scale(find_expn(x_tilde_abs), 10);
 611	Q_B1 = find_proper_scale(find_expn(B1_abs_max), 10);
 612	Q_B2 = find_proper_scale(find_expn(B2_abs_max), 10);
 613
 614	beta_raw = 0;
 615	alpha_raw = 0;
 616	for (i = 0; i <= L; i++) {
 617		x_tilde[i] = x_tilde[i] / (1 << Q_x);
 618		B1_tmp[i] = B1_tmp[i] / (1 << Q_B1);
 619		B2_tmp[i] = B2_tmp[i] / (1 << Q_B2);
 620		beta_raw = beta_raw + B1_tmp[i] * x_tilde[i];
 621		alpha_raw = alpha_raw + B2_tmp[i] * x_tilde[i];
 622	}
 623
 624	scale_B =
 625	    ((sum_y_quad / scale_factor) * (L + 1) -
 626	     (sum_y_sqr / scale_factor) * sum_y_sqr) * scale_factor;
 627
 628	Q_scale_B = find_proper_scale(find_expn(abs(scale_B)), 10);
 629	scale_B = scale_B / (1 << Q_scale_B);
 630	if (scale_B == 0)
 631		return false;
 632	Q_beta = find_proper_scale(find_expn(abs(beta_raw)), 10);
 633	Q_alpha = find_proper_scale(find_expn(abs(alpha_raw)), 10);
 634	beta_raw = beta_raw / (1 << Q_beta);
 635	alpha_raw = alpha_raw / (1 << Q_alpha);
 636	alpha = (alpha_raw << 10) / scale_B;
 637	beta = (beta_raw << 10) / scale_B;
 638	order_1 = 3 * M - Q_x - Q_B1 - Q_beta + 10 + Q_scale_B;
 639	order_2 = 3 * M - Q_x - Q_B2 - Q_alpha + 10 + Q_scale_B;
 640	order1_5x = order_1 / 5;
 641	order2_3x = order_2 / 3;
 642	order1_5x_rem = order_1 - 5 * order1_5x;
 643	order2_3x_rem = order_2 - 3 * order2_3x;
 644
 645	for (i = 0; i < PAPRD_TABLE_SZ; i++) {
 646		tmp = i * 32;
 647		y5 = ((beta * tmp) >> 6) >> order1_5x;
 648		y5 = (y5 * tmp) >> order1_5x;
 649		y5 = (y5 * tmp) >> order1_5x;
 650		y5 = (y5 * tmp) >> order1_5x;
 651		y5 = (y5 * tmp) >> order1_5x;
 652		y5 = y5 >> order1_5x_rem;
 653		y3 = (alpha * tmp) >> order2_3x;
 654		y3 = (y3 * tmp) >> order2_3x;
 655		y3 = (y3 * tmp) >> order2_3x;
 656		y3 = y3 >> order2_3x_rem;
 657		PA_in[i] = y5 + y3 + (256 * tmp) / G_fxp;
 658
 659		if (i >= 2) {
 660			tmp = PA_in[i] - PA_in[i - 1];
 661			if (tmp < 0)
 662				PA_in[i] =
 663				    PA_in[i - 1] + (PA_in[i - 1] -
 664						    PA_in[i - 2]);
 665		}
 666
 667		PA_in[i] = (PA_in[i] < 1400) ? PA_in[i] : 1400;
 668	}
 669
 670	beta_raw = 0;
 671	alpha_raw = 0;
 672
 673	for (i = 0; i <= L; i++) {
 674		int theta_tilde =
 675		    ((theta[i + I] << M) + y_est[i + I]) / y_est[i + I];
 676		theta_tilde =
 677		    ((theta_tilde << M) + y_est[i + I]) / y_est[i + I];
 678		theta_tilde =
 679		    ((theta_tilde << M) + y_est[i + I]) / y_est[i + I];
 680		beta_raw = beta_raw + B1_tmp[i] * theta_tilde;
 681		alpha_raw = alpha_raw + B2_tmp[i] * theta_tilde;
 682	}
 683
 684	Q_beta = find_proper_scale(find_expn(abs(beta_raw)), 10);
 685	Q_alpha = find_proper_scale(find_expn(abs(alpha_raw)), 10);
 686	beta_raw = beta_raw / (1 << Q_beta);
 687	alpha_raw = alpha_raw / (1 << Q_alpha);
 688
 689	alpha = (alpha_raw << 10) / scale_B;
 690	beta = (beta_raw << 10) / scale_B;
 691	order_1 = 3 * M - Q_x - Q_B1 - Q_beta + 10 + Q_scale_B + 5;
 692	order_2 = 3 * M - Q_x - Q_B2 - Q_alpha + 10 + Q_scale_B + 5;
 693	order1_5x = order_1 / 5;
 694	order2_3x = order_2 / 3;
 695	order1_5x_rem = order_1 - 5 * order1_5x;
 696	order2_3x_rem = order_2 - 3 * order2_3x;
 697
 698	for (i = 0; i < PAPRD_TABLE_SZ; i++) {
 699		int PA_angle;
 700
 701		/* pa_table[4] is calculated from PA_angle for i=5 */
 702		if (i == 4)
 703			continue;
 704
 705		tmp = i * 32;
 706		if (beta > 0)
 707			y5 = (((beta * tmp - 64) >> 6) -
 708			      (1 << order1_5x)) / (1 << order1_5x);
 709		else
 710			y5 = ((((beta * tmp - 64) >> 6) +
 711			       (1 << order1_5x)) / (1 << order1_5x));
 712
 713		y5 = (y5 * tmp) / (1 << order1_5x);
 714		y5 = (y5 * tmp) / (1 << order1_5x);
 715		y5 = (y5 * tmp) / (1 << order1_5x);
 716		y5 = (y5 * tmp) / (1 << order1_5x);
 717		y5 = y5 / (1 << order1_5x_rem);
 718
 719		if (beta > 0)
 720			y3 = (alpha * tmp -
 721			      (1 << order2_3x)) / (1 << order2_3x);
 722		else
 723			y3 = (alpha * tmp +
 724			      (1 << order2_3x)) / (1 << order2_3x);
 725		y3 = (y3 * tmp) / (1 << order2_3x);
 726		y3 = (y3 * tmp) / (1 << order2_3x);
 727		y3 = y3 / (1 << order2_3x_rem);
 728
 729		if (i < 4) {
 730			PA_angle = 0;
 731		} else {
 732			PA_angle = y5 + y3;
 733			if (PA_angle < -150)
 734				PA_angle = -150;
 735			else if (PA_angle > 150)
 736				PA_angle = 150;
 737		}
 738
 739		pa_table[i] = ((PA_in[i] & 0x7ff) << 11) + (PA_angle & 0x7ff);
 740		if (i == 5) {
 741			PA_angle = (PA_angle + 2) >> 1;
 742			pa_table[i - 1] = ((PA_in[i - 1] & 0x7ff) << 11) +
 743			    (PA_angle & 0x7ff);
 744		}
 745	}
 746
 747	*gain = G_fxp;
 748	return true;
 749}
 750
 751void ar9003_paprd_populate_single_table(struct ath_hw *ah,
 752					struct ath9k_hw_cal_data *caldata,
 753					int chain)
 754{
 755	u32 *paprd_table_val = caldata->pa_table[chain];
 756	u32 small_signal_gain = caldata->small_signal_gain[chain];
 757	u32 training_power = ah->paprd_training_power;
 758	u32 reg = 0;
 759	int i;
 760
 761	if (chain == 0)
 762		reg = AR_PHY_PAPRD_MEM_TAB_B0;
 763	else if (chain == 1)
 764		reg = AR_PHY_PAPRD_MEM_TAB_B1;
 765	else if (chain == 2)
 766		reg = AR_PHY_PAPRD_MEM_TAB_B2;
 767
 768	for (i = 0; i < PAPRD_TABLE_SZ; i++) {
 769		REG_WRITE(ah, reg, paprd_table_val[i]);
 770		reg = reg + 4;
 771	}
 772
 773	if (chain == 0)
 774		reg = AR_PHY_PA_GAIN123_B0;
 775	else if (chain == 1)
 776		reg = AR_PHY_PA_GAIN123_B1;
 777	else
 778		reg = AR_PHY_PA_GAIN123_B2;
 779
 780	REG_RMW_FIELD(ah, reg, AR_PHY_PA_GAIN123_PA_GAIN1, small_signal_gain);
 781
 782	REG_RMW_FIELD(ah, AR_PHY_PAPRD_CTRL1_B0,
 783		      AR_PHY_PAPRD_CTRL1_PAPRD_POWER_AT_AM2AM_CAL,
 784		      training_power);
 785
 786	if (ah->caps.tx_chainmask & BIT(1))
 787		REG_RMW_FIELD(ah, AR_PHY_PAPRD_CTRL1_B1,
 788			      AR_PHY_PAPRD_CTRL1_PAPRD_POWER_AT_AM2AM_CAL,
 789			      training_power);
 790
 791	if (ah->caps.tx_chainmask & BIT(2))
 792		/* val AR_PHY_PAPRD_CTRL1_PAPRD_POWER_AT_AM2AM_CAL correct? */
 793		REG_RMW_FIELD(ah, AR_PHY_PAPRD_CTRL1_B2,
 794			      AR_PHY_PAPRD_CTRL1_PAPRD_POWER_AT_AM2AM_CAL,
 795			      training_power);
 796}
 797EXPORT_SYMBOL(ar9003_paprd_populate_single_table);
 798
 799void ar9003_paprd_setup_gain_table(struct ath_hw *ah, int chain)
 800{
 801	unsigned int i, desired_gain, gain_index;
 802	unsigned int train_power = ah->paprd_training_power;
 803
 804	desired_gain = ar9003_get_desired_gain(ah, chain, train_power);
 805
 806	gain_index = 0;
 807	for (i = 0; i < PAPRD_GAIN_TABLE_ENTRIES; i++) {
 808		if (ah->paprd_gain_table_index[i] >= desired_gain)
 809			break;
 810		gain_index++;
 811	}
 812
 813	ar9003_tx_force_gain(ah, gain_index);
 814
 815	REG_CLR_BIT(ah, AR_PHY_PAPRD_TRAINER_STAT1(ah),
 816			AR_PHY_PAPRD_TRAINER_STAT1_PAPRD_TRAIN_DONE);
 817}
 818EXPORT_SYMBOL(ar9003_paprd_setup_gain_table);
 819
 820static bool ar9003_paprd_retrain_pa_in(struct ath_hw *ah,
 821				       struct ath9k_hw_cal_data *caldata,
 822				       int chain)
 823{
 824	u32 *pa_in = caldata->pa_table[chain];
 825	int capdiv_offset, quick_drop_offset;
 826	int capdiv2g, quick_drop;
 827	int count = 0;
 828	int i;
 829
 830	if (!AR_SREV_9485(ah) && !AR_SREV_9330(ah))
 831		return false;
 832
 833	capdiv2g = REG_READ_FIELD(ah, AR_PHY_65NM_CH0_TXRF3,
 834				  AR_PHY_65NM_CH0_TXRF3_CAPDIV2G);
 835
 836	quick_drop = REG_READ_FIELD(ah, AR_PHY_PAPRD_TRAINER_CNTL3(ah),
 837				    AR_PHY_PAPRD_TRAINER_CNTL3_CF_PAPRD_QUICK_DROP);
 838
 839	if (quick_drop)
 840		quick_drop -= 0x40;
 841
 842	for (i = 0; i < NUM_BIN + 1; i++) {
 843		if (pa_in[i] == 1400)
 844			count++;
 845	}
 846
 847	if (AR_SREV_9485(ah)) {
 848		if (pa_in[23] < 800) {
 849			capdiv_offset = (int)((1000 - pa_in[23] + 75) / 150);
 850			capdiv2g += capdiv_offset;
 851			if (capdiv2g > 7) {
 852				capdiv2g = 7;
 853				if (pa_in[23] < 600) {
 854					quick_drop++;
 855					if (quick_drop > 0)
 856						quick_drop = 0;
 857				}
 858			}
 859		} else if (pa_in[23] == 1400) {
 860			quick_drop_offset = min_t(int, count / 3, 2);
 861			quick_drop += quick_drop_offset;
 862			capdiv2g += quick_drop_offset / 2;
 863
 864			if (capdiv2g > 7)
 865				capdiv2g = 7;
 866
 867			if (quick_drop > 0) {
 868				quick_drop = 0;
 869				capdiv2g -= quick_drop_offset;
 870				if (capdiv2g < 0)
 871					capdiv2g = 0;
 872			}
 873		} else {
 874			return false;
 875		}
 876	} else if (AR_SREV_9330(ah)) {
 877		if (pa_in[23] < 1000) {
 878			capdiv_offset = (1000 - pa_in[23]) / 100;
 879			capdiv2g += capdiv_offset;
 880			if (capdiv_offset > 3) {
 881				capdiv_offset = 1;
 882				quick_drop--;
 883			}
 884
 885			capdiv2g += capdiv_offset;
 886			if (capdiv2g > 6)
 887				capdiv2g = 6;
 888			if (quick_drop < -4)
 889				quick_drop = -4;
 890		} else if (pa_in[23] == 1400) {
 891			if (count > 3) {
 892				quick_drop++;
 893				capdiv2g -= count / 4;
 894				if (quick_drop > -2)
 895					quick_drop = -2;
 896			} else {
 897				capdiv2g--;
 898			}
 899
 900			if (capdiv2g < 0)
 901				capdiv2g = 0;
 902		} else {
 903			return false;
 904		}
 905	}
 906
 907	REG_RMW_FIELD(ah, AR_PHY_65NM_CH0_TXRF3,
 908		      AR_PHY_65NM_CH0_TXRF3_CAPDIV2G, capdiv2g);
 909	REG_RMW_FIELD(ah, AR_PHY_PAPRD_TRAINER_CNTL3(ah),
 910		      AR_PHY_PAPRD_TRAINER_CNTL3_CF_PAPRD_QUICK_DROP,
 911		      quick_drop);
 912
 913	return true;
 914}
 915
 916int ar9003_paprd_create_curve(struct ath_hw *ah,
 917			      struct ath9k_hw_cal_data *caldata, int chain)
 918{
 919	u16 *small_signal_gain = &caldata->small_signal_gain[chain];
 920	u32 *pa_table = caldata->pa_table[chain];
 921	u32 *data_L, *data_U;
 922	int i, status = 0;
 923	u32 *buf;
 924	u32 reg;
 925
 926	memset(caldata->pa_table[chain], 0, sizeof(caldata->pa_table[chain]));
 927
 928	buf = kmalloc_array(2 * 48, sizeof(u32), GFP_KERNEL);
 929	if (!buf)
 930		return -ENOMEM;
 931
 932	data_L = &buf[0];
 933	data_U = &buf[48];
 934
 935	REG_CLR_BIT(ah, AR_PHY_CHAN_INFO_MEMORY(ah),
 936		    AR_PHY_CHAN_INFO_MEMORY_CHANINFOMEM_S2_READ);
 937
 938	reg = AR_PHY_CHAN_INFO_TAB_0;
 939	for (i = 0; i < 48; i++)
 940		data_L[i] = REG_READ(ah, reg + (i << 2));
 941
 942	REG_SET_BIT(ah, AR_PHY_CHAN_INFO_MEMORY(ah),
 943		    AR_PHY_CHAN_INFO_MEMORY_CHANINFOMEM_S2_READ);
 944
 945	for (i = 0; i < 48; i++)
 946		data_U[i] = REG_READ(ah, reg + (i << 2));
 947
 948	if (!create_pa_curve(data_L, data_U, pa_table, small_signal_gain))
 949		status = -2;
 950
 951	if (ar9003_paprd_retrain_pa_in(ah, caldata, chain))
 952		status = -EINPROGRESS;
 953
 954	REG_CLR_BIT(ah, AR_PHY_PAPRD_TRAINER_STAT1(ah),
 955		    AR_PHY_PAPRD_TRAINER_STAT1_PAPRD_TRAIN_DONE);
 956
 957	kfree(buf);
 958
 959	return status;
 960}
 961EXPORT_SYMBOL(ar9003_paprd_create_curve);
 962
 963int ar9003_paprd_init_table(struct ath_hw *ah)
 964{
 965	int ret;
 966
 967	ret = ar9003_paprd_setup_single_table(ah);
 968	if (ret < 0)
 969	    return ret;
 970
 971	ar9003_paprd_get_gain_table(ah);
 972	return 0;
 973}
 974EXPORT_SYMBOL(ar9003_paprd_init_table);
 975
 976bool ar9003_paprd_is_done(struct ath_hw *ah)
 977{
 978	int paprd_done, agc2_pwr;
 979
 980	paprd_done = REG_READ_FIELD(ah, AR_PHY_PAPRD_TRAINER_STAT1(ah),
 981				AR_PHY_PAPRD_TRAINER_STAT1_PAPRD_TRAIN_DONE);
 982
 983	if (AR_SREV_9485(ah))
 984		goto exit;
 985
 986	if (paprd_done == 0x1) {
 987		agc2_pwr = REG_READ_FIELD(ah, AR_PHY_PAPRD_TRAINER_STAT1(ah),
 988				AR_PHY_PAPRD_TRAINER_STAT1_PAPRD_AGC2_PWR);
 989
 990		ath_dbg(ath9k_hw_common(ah), CALIBRATE,
 991			"AGC2_PWR = 0x%x training done = 0x%x\n",
 992			agc2_pwr, paprd_done);
 993	/*
 994	 * agc2_pwr range should not be less than 'IDEAL_AGC2_PWR_CHANGE'
 995	 * when the training is completely done, otherwise retraining is
 996	 * done to make sure the value is in ideal range
 997	 */
 998		if (agc2_pwr <= PAPRD_IDEAL_AGC2_PWR_RANGE)
 999			paprd_done = 0;
1000	}
1001exit:
1002	return !!paprd_done;
1003}
1004EXPORT_SYMBOL(ar9003_paprd_is_done);
1005
1006bool ar9003_is_paprd_enabled(struct ath_hw *ah)
1007{
1008	if ((ah->caps.hw_caps & ATH9K_HW_CAP_PAPRD) && ah->config.enable_paprd)
1009		return true;
1010
1011	return false;
1012}
1013EXPORT_SYMBOL(ar9003_is_paprd_enabled);